Perspective - Right and Left side can be expanded or reduced to product a perspective effect.

Full - all four corner points can be changed independently

Reset

Resets to the default values

Distortion and Perspective

Distortion allows you to alter the background image to better match the perspective in your model.

In Perspective Distortion, the left and rights sides of the image are always kept vertical, and when you move one corner up or down, the other corner on the same side is moved by the same amount.

This often make it easy to match the background image to a perspective view. If you want more control select Full Distortion which lets you move all 4 corners independently.

Background Image placed behind perspective wall and windows.The lack of perspective in the background clashes with the perspective of the windows.
Select Perspective Distortion to let you distort the background to match the perspective view.

Adjust right hand corners to add perspective to backgroundAs you move one corner up or down, the other corner is automatically moved to match.

By dragging the right hand center handle, all three right hand handles are moved together.